CS130 100A. This Unit Has an Offset 8mm Top Adjusting Ear and Measures 3.07" From the Center To the Bottom Ear. The 7860 and 7861 are Similar, Except the Adjusting Ears Are On the Opposite Sides. These Units May Use A Different Rear Bearing Retainer, Depending on the OEM Number. Pulleys Vary With Clock Position, But are Interchangeable. The Same Unit, But With a Larger 6303 Front Bearing, and a Taller Rear Bearing, is the 8169 (Available in 3:00, 7:00 or 11:00).